Eight channel pipetting arm



FIG. 1 is a front, bottom, left perspective view of an eight channel pipetting arm showing our design therefor;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a left, top, rear perspective view thereof.

The broken lines in the drawings depict portions of the eight channel pipetting arm and form no part of the claimed design. 

CLAIM The ornamental design for an eight channel pipetting arm, as shown and described. 